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  • 95rayburn
    Senior Member
    • Sep 2012
    • 162

    #1

    cross

    What percent of cross is to low and what percent is to high for a Rayburn
  • abe_05
    Member
    • Mar 2010
    • 63

    #2
    Good rule of thumb is 1 % of rear percentage, if you have 55 % rear your cross would be in the 54-56 %. This is with standard Rayburn setup.

    Comment

    • 48bad
      Member
      • Nov 2009
      • 30

      #3
      I think Rayburn says cross should be within 2% of left side percentage.

      Comment

      • F22 RAPTOR
        Senior Member
        • Jul 2010
        • 1023

        #4
        Originally posted by 95rayburn View Post
        What percent of cross is to low and what percent is to high for a Rayburn
        I never use cross, bite only. I run even weight on fronts, sometimes favoring LF, then left % and Rear %.
        "If racing were easy, everybody would do it."

        #77 Leon "Slick" Sells

        Comment

        • dualdj1
          Senior Member
          • Jun 2009
          • 654

          #5
          we also tried to keep fronts even, and then around 54% left/cross, and 56ish rear.

          Comment

          • F22 RAPTOR
            Senior Member
            • Jul 2010
            • 1023

            #6
            Originally posted by dualdj1 View Post
            we also tried to keep fronts even, and then around 54% left/cross, and 56ish rear.
            Very nice. I actually learned to scale that way from two sources, one was Scott Bloomquist and the other was Frank McClendon from "Custom Chassis". Frank told me about keeping the fronts equal, but I learned along the way that sometimes when the car/kart is tight at center turn, off the throttle, that favoring the LF helps turn the corner. Ignoring, "Cross %" in favor of bite #, was Bloomquist. I even used this method in karts and always did well. Hope this helps and I like the 54/56 setup, kudos to "Dualj1".
            "If racing were easy, everybody would do it."

            #77 Leon "Slick" Sells

            Comment

            • jason29a
              Senior Member
              • May 2009
              • 491

              #7
              Originally posted by F22 RAPTOR View Post
              Very nice. I actually learned to scale that way from two sources, one was Scott Bloomquist and the other was Frank McClendon from "Custom Chassis". Frank told me about keeping the fronts equal, but I learned along the way that sometimes when the car/kart is tight at center turn, off the throttle, that favoring the LF helps turn the corner. Ignoring, "Cross %" in favor of bite #, was Bloomquist. I even used this method in karts and always did well. Hope this helps and I like the 54/56 setup, kudos to "Dualj1".
              How much bite do you usually end up with?

              Comment

              • racin6mod
                Senior Member
                • Feb 2008
                • 2172

                #8
                Originally posted by 48bad View Post
                I think Rayburn says cross should be within 2% of left side percentage.
                this is correct we had ours with in 5 pounds and the cars was quick on a dry slick track we had our best summer with this set up.

                Comment

                • jayjohnsonj1
                  Senior Member
                  • Nov 2009
                  • 163

                  #9
                  Originally posted by jason29a View Post
                  How much bite do you usually end up with?
                  That will probably come up around 170 to 180
                  www.jayjohnson.net

                  Comment

                  • F22 RAPTOR
                    Senior Member
                    • Jul 2010
                    • 1023

                    #10
                    Originally posted by jason29a View Post
                    How much bite do you usually end up with?
                    Depends on car and suspension type. With leaf cars and early 4 link it was lower, but modern swing arm and 4 link takes more depending on setup package and driver preference.
                    "If racing were easy, everybody would do it."

                    #77 Leon "Slick" Sells

                    Comment

                    • swingarm4life
                      Senior Member
                      • Apr 2008
                      • 155

                      #11
                      Just put 225-235 lbs in there and let her eat!

                      Comment

                      • dualdj1
                        Senior Member
                        • Jun 2009
                        • 654

                        #12
                        we were swingarm left, z right. We ran like 180 bite, and we'd go up to 220ish i believe. Was heavier but worked well for us.

                        F22 was a good setup, worked well in those cars. The pierce we have is way off in the front, 50-75 lbs split at least. Doesn't seem to make any difference though.

                        Comment

                        • F22 RAPTOR
                          Senior Member
                          • Jul 2010
                          • 1023

                          #13
                          Originally posted by dualdj1 View Post
                          we were swingarm left, z right. We ran like 180 bite, and we'd go up to 220ish i believe. Was heavier but worked well for us.

                          F22 was a good setup, worked well in those cars. The pierce we have is way off in the front, 50-75 lbs split at least. Doesn't seem to make any difference though.
                          I have absolutely no knowledge on Pierce cars. I do know at one time he was based off a Rayburn but he tends to go his own way and I'm sure he's a good bit different these days, but I could be wrong. Down here in GA where I am nobody has a Pierce and Rayburns are almost non existant anymore, mostly Barry Wrights, Rockets, Mastersbilts and a few TNT and DWB's. Even GRT's are few and far between around here these days.
                          "If racing were easy, everybody would do it."

                          #77 Leon "Slick" Sells

                          Comment

                          • 95rayburn
                            Senior Member
                            • Sep 2012
                            • 162

                            #14
                            I read a article that said higher the cross the looser the car is. Is this true or false

                            Comment

                            • dualdj1
                              Senior Member
                              • Jun 2009
                              • 654

                              #15
                              more cross can loosen off throttle, but will generally tighten on-throttle. So more bite, and in turn more cross, generally means tighter.

                              Comment

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